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Thread: Trolling motor interference.

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  1. 03-04-2017, 06:27 PM #1
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    Default Trolling motor interference.

    I have a 999ci hd si combo. The transducer is TM mounted.Took it out for the first time today. Every time I turnon the TM the color changes on the screen. I noticed it only did that in SI mode.
    I tried adjusting the sensitivity and contrast but no joy. Any suggestions on what to do?
    Thanks Fin
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  2. 03-04-2017, 06:51 PM #2
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    Read this ...
    http://www.humminbird.com/Category/S...-Interference/

    Then call HB ... They deal with interference every day with customers ...
    1-800-633-1468
    -----

    There is also a lot of info in this thread ...
    http://www.crappie.com/crappie/fishi...-interference/

    Rickie
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  3. 03-04-2017, 08:49 PM #3
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    I have a 24v and had it connected to the trolling motor battery instead of the starting battery. That may have been it.
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  4. 03-04-2017, 09:07 PM #4
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    Quote Originally Posted by FIN View Post
    I have a 24v and had it connected to the trolling motor battery instead of the starting battery. That may have been it.
    Very likely
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  5. 03-09-2017, 09:36 PM #5
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    Quote Originally Posted by CatFan View Post
    Very likely
    Didn't work. My boat has a 24v system. The starter battery is connected to the TM battery to make 24v. Will I have to have a 3rd battery for the Humminbird?
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  6. 03-10-2017, 08:30 AM #6
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    Quote Originally Posted by FIN View Post
    Didn't work. My boat has a 24v system. The starter battery is connected to the TM battery to make 24v. Will I have to have a 3rd battery for the Humminbird?
    You can test this by temporarily installing a separate battery for the electronics ...

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  7. 03-09-2017, 10:16 PM #7
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    My TM power has a Electro Guard. Does that matter?

    Electro Guard 2 1/4 Inch Zinc Boat Propellar Shaft Anode | Great Lakes Skipper
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  8. 03-10-2017, 02:14 PM #8
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    I bought a Schumacher 1000 Peak Amp Instant Portable Power Source. It has a 12v outlet. Ill try it.
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  9. 03-10-2017, 05:14 PM #9
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    Independent battery fixed it.
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